Samuel Ignatius Pereira's picture

Samuel Ignatius Pereira

Postdoctoral Fellow
  • E-mailsamuel.pereira@uib.no
  • Visitor Address
    Allégaten 41
    5007 Bergen
    3A10f - 3103
  • Postal Address
    Postboks 7803
    5020 Bergen

My research aims at understanding fluid-microbe interactions. I'm interested in the formation of organic molecules as a result of pyrolysis of microbial biomass (Archaeal and Bacterial) under various hydrothermal conditions using the Dickson-type flexible-cell high temperature-pressure reactors.

My work also includes understanding the formation and interactions of various organic compounds and nutrients in natural hydrothermal systems and their role on microbial metabolism. 

I am also interested in understanding the effects of fluid-rock interactions, magma degassing, sub-surface cooling and mixing of seawater on hydrothermal fluids using fluid geochemistry and thermodynamic modelling. I'm based at the Department of Earth Sciences and the Centre for Deep Sea Research . 



2012 GS22 ► R/V GO Sars/ROV Ægir ►Arctic Mid-Oceanic ridge

2021 HACON21 ► R/V Kronprins Haakon/ROV Aurora(REV Ocean) ►Gakkel Ridge: Aurora vent field

2019 GS19 ► R/V GO Sars/ROV Ægir ►Arctic Mid-Oceanic ridge: 73°N Vent Site

2019 PS119 ► R/V Polarstern/ROV Quest 4000m ► East Scotia ridge and South Sandwich island arc 

2018 M149 ► R/V Meteor/MeBo-70 ► Gulf of Cadiz


Curriculum Vitae

  • 08/2020-present: PhD Research Fellow, University of Bergen.
  • 10/2017-01/2020: MSc Marine Geosciences, University of Bremen, Germany.          Thesis: Geochemical investigations of hydrothermal fluids from the South Sandiwch island arc, Southern Ocean.
  • 07/2014-07/2017: BSc Geology, St Xavier's College, University of Mumbai, India. 
  • 2021

Expedition HACON21 blog 

Article in Aftenposten (The search for the origin of life) about NFR project HyPOD. 

  • 2020

Expedition PS119 (Into the Deep) blog post in Google Arts and Culture

Academic article
  • Show author(s) (2022). Sulfur formation associated with coexisting sulfide minerals in the Kemp Caldera hydrothermal system, Scotia Sea. Chemical Geology.
  • Show author(s) (2022). Hot Vents Beneath an Icy Ocean: The Aurora Vent Field, Gakkel Ridge, Revealed. Oceanography. 12 pages.
  • Show author(s) (2022). Geochemistry of Hydrothermal Fluids From the E2-Segment of the East Scotia Ridge: Magmatic Input, Reaction Zone Processes, Fluid Mixing Regimes and Bioenergetic Landscapes. Frontiers in Marine Science.
  • Show author(s) (2022). Elemental sulfur formation in the Kemp Caldera hydrothermal system, Scotia Sea. EGU General Assembly.

More information in national current research information system (CRIStin)


[3] Ramirez-Llodra, E., C. Argentino, M. Baker, A. Boetius, C. Costa, H. Dahle, E.M. Denny, P.-A. Dessandier, M.H. Eilertsen, B. Ferre, C.R. German, K. Hand, A. Hilário, L. Hislop, J.W. Jamieson, D. Kalnitchenko, A. Mall, G. Panieri, A. Purser, S.P. Ramalho, E.P. Reeves, L. Rolley, S.I. Pereira, P.A. Ribeiro, M.F. Sert, I.H. Steen, M. Stetzler, R. Stokke, L. Victorero, F. Vulcano, S. Vågenes, K.A. Waghorn, S. Buenz (2023) Hot vents beneath an icy ocean: The Aurora Vent Field, Gakkel Ridge, revealed. Oceanography, 36. DOI: 10.5670/oceanog.2023.103

[2] Kürzinger, V., Bach, W., Diehl, A., Pereira, S.I., Strauss, H. and Bohrmann, G., (2022). Sulfur formation associated with coexisting sulfide minerals in the Kemp Caldera hydrothermal system, Scotia Sea. Chemical Geology, p.120927. DOI: 10.1016/j.chemgeo.2022.120927

[1] Pereira, S.I., Diehl, A., McDermott, J.M., Pape, T., Klose, L., Strauss, H., Bohrmann, G. and Bach, W (2022). Geochemistry of hydrothermal fluids from the E2-segment of the East Scotia Ridge: Magmatic input, reaction zone processes, fluid mixing regimes and bioenergetic landscapes. Frontiers in Marine Science. DOI:https://doi.org/10.3389/fmars.2022.765648 


  • Advanced Ion Chromatography (HPIC with CD and ED)

I work with the Dionex ICS 5000 to analyse anions (F, Cl, Br, SO4, NO3 and PO4), cations (NH4) and carboxylic acids (formate, acetate, propionate, butyrate, valerate and caproate) using conductivity detection. I also have a working method set up to analyse amino acids using electrochemical detection.  

  • Cultivation of extremophile microbes 

My work involves working with mesophilic sulphur oxidizing bacteria's and hyperthermophilic methanogens under anaerobic conditions. I'm currently working on cultures of Sulfurovum riftiae and Methanocaldococcus villosus.                

Research groups